baber/WOPTO huggingface dataset:
Patent GB-1331074-A (GB)
Title: Manufacture of selenium rectifier plates
IPC: H01L21/10
Filed: 1970-12-10
Abstract: 1331074 Selenium rectifiers SEMIKRON GES FUR GLEICHRICHTERBAU UND ELEKTRONIK mbH 10 Dec 1970 [19 Dec 1969] 58601/70 Heading H1K A selenium plate rectifier comprises a layer of selenium between a carrier plate 1 and a cover electrode 20, the selenium layer comprising an inner 11, and two outer 12a, 12b, sub-layers, all three sub-layers having a halogen concentration in atomic ratio to selenium of between 1À5 + 10<SP>-4</SP> and 3 x 10<SP>-4</SP> to 1, the inner sub-layer also containing indium in a concentration of 65 to 350 mgs. per 100 grms. of selenium, the sub-layers being initially deposited in an amorphous condition and subsequently heat treated to produce a crystalline structure. The carrier plate may be of steel or aluminium coated with a layer 2 of nickel or bismuth. The halogen may be chlorine. The selenium sub-layers may be vacuum deposited at a temperature between 90 and 140‹ C. to the desired thickness which may be 0À5 to 5Ám for the sub-layer 11. Subsequently the cover electrode is formed from an eutectic alloy of tin and cadmium or tin, cadmium and bismuth. The device is then heat treated for 30 mins. at 200‹ C. to produce the crystalline structure, and also to form metal selenide layers 3, 19. Thallium may be deposited on the sublayer 12b or added to either the sub-layer 12b or the cover electrode 20 to improve the reverse voltage characteristics.
Patent GB-1287007-A (GB)
Title: Apparatus for including an asynchronous motor and means controlling the frequency of the voltage supplied to the asynchronous motor
IPC: H02P27/04
Filed: 1969-12-03
Abstract: 1287007 Electric motors GOLAY BUCHEL & CIE 3 Dee 1969 [5 Dec 1968] 59047/69 Heading H2A In an asynchronous motor having an electronically commutated winding, the rotor position is detected by a pick-up device comprising a discontinuous screen 3 rotatable with the motor shaft 2, and a source of energy 9 and a detector 10 disposed on opposite sides of the screen, the detector being driven by an auxiliary motor 6 in the direction opposite that of the screen. In the system shown the energy source is a light bulb and the detector a photoelectric cell. There may be one or two cells per phase of the winding. It is stated that the arrangement provides for a constant slip frequency and prevents generator operation.
Patent GB-1267558-A (GB)
Title: Vehicle braking pressure control system
IPC: F16D65/18
Filed: 1969-12-04
Abstract: 1,267,558. Hydraulic systems; disc brakes; brake actuation. BENDIX CORP. 4 Dec., 1969 [31 Dec., 1968], No. 59171/69. Headings F2E and F2F. A vehicle braking pressure control system, a service braking system, viz. conduit 38, port 66, cylinder bore 68 and piston 70, controlled by a brake pedal 52 and an emergency braking system, viz. conduit 114, port 81, cylinder bore 80, piston 82 and including at least one brake mechanism applied by Belleville washers 98 controlled by an operator operated valve 110 adapted to connect the bore 80 either with a brake valve 34 acting as a high pressure fluid source (see Fig. 2) or with an accumulator 30 acting as a low pressure fluid source (see Fig. 1) so as to release by fluid pressure and apply by the action of the washers 98 the emergency brake mechanism respectively, the valve 110 being actuated towards the brake-applying position by a hand linkage wire 140 or by the brake pedal 52 upon an overtravel thereof as a result of a failure in the service braking system. As shown, the emergency brake mechanism is formed as a respective part of a pair of rear disc brakes 12 of a vehicle and each mechanism includes an automatic adjuster assembly 104 of mated threaded parts. The valve 110 which comprises a valve plug 122 rotatable in a cylindrical bore 120 may also be actuated by a gear selector mechanism 190; movement of the transmission mechanism to a park position " P " de-energizes a switch 188, ignition switch 186 also or alternatively being de-energized, a coil 184 is de-energized, and a disc valve 178 will be pushed on to valve seat 179 in a conduit 174 leading from the vehicle engine inlet manifold 176, whereupon a vacuum will be directed to a vacuum actuator 168 to pull a link 164 and rotate lever 128 and valve plug 122 counterclockwise to apply the emergency brake mechanism.
Patent GB-1208198-A (GB)
Title: Conveyors for mineral mines and installations employing such conveyors
IPC: E21C25/56
Filed: 1968-12-13
Abstract: 1,208,198. Mineral mining installations. GEWERKSCHAFT EISENHUTTE WESTFALIA. 13 Dec., 1968 [23 April, 1968], No. 59355/68. Heading E1P. A mineral mining installation comprises a longwall conveyor 13 having a plough guided for movement along its mineral-face-side, see Fig. 1 (not shown), a first plate 18 with a guide rail 17 attached to the goaf side of the conveyor, a second winning machine mounted on the rail and extending across the conveyor and a further plate 21, 22 detachably secured to the first plate and disposed on the goaf side thereof to define therewith two separate passages for the haulage and return run of the traction chain 28 of the second winning machine. Guard plates 33 and frames 36 may also be attached to the conveyor to-gether with an L-shaped plate 24 having an apertured lug 26' for the attachment of an advancing ram. Service conduits 32, 37 may be arranged as shown.
Patent GB-1451336-A (GB)
Title: Dobbies
IPC: D03C1/26
Filed: 1973-12-21
Abstract: 1451336 Dobbies YAMADA DOBBY CO Ltd 21 Dec 1973 [29 Dec 1972] 59369/73 Heading D1E Draw knives 1A, 1B are attached to sliders 2A, 2B that are reciprocated in opposite directions by cams 8A, 8B attached to gears 9A, 9B rotated by common pinions 7. The cams 8A, 8B operate on followers 4A, 4B rotatably mounted on the sliders 2A, 2B
Patent GB-1253820-A (GB)
Title: Fabrication of field effect transistors
Inventor: BROWN DALE MARIUS
IPC: H01L21/225
Filed: 1968-12-13
Abstract: 1,253,820. Insulated gate field effect transistors. GENERAL ELECTRIC CO. 13 Dec., 1968 [18 Dec., 1967], No. 59514/68. Heading H1K. An IGFET is formed, normally in multiple, by forming an undoped layer of insulation over one face of an N(P) type semi-conductor body, depositing acceptor (donor) doped insulation over the entire layer and selectively etching to remove it over the gate sites, heating to diffuse the dopant through the undoped insulation to form source and drain regions and then providing source, drain and gate electrodes. Typically the undoped layer is silixon oxide formed by thermal oxidation of a 100 face of an N-type silicone wafer. A layer of boron doped silica is then formed by pyrolysis of a mixture of ethyl orthosilicate and triethyl borate carried in a stream of argon. This layer is removed at the gate sites by photoresist and etching steps and then diffusion is effected at 1000-1200 C. to form P-type source and drain regions 2-5 Á deep. Apertures extending thereto through the insulation are formed by photoresist and etching steps. Then aluminium is vapour deposited overall and shaped to form source, drain and gate electrodes by photoresist masking followed by etching in a mixture of orthophosphoric, acetic, and nitric acids. Wires are thermocompression bonded to pad extensions of the electrodes and the wafer ohmically soldered to a copper header. As an alternative the wafer is P-type in which case triethyl phosphate is used to dope the second oxide layer. In either case an undoped layer may be deposited before the doped layer to facilitate localised removal of the latter withoutaffecting the thermally grown layer. In an alternative process to avoid contamination of the thermal oxide during diffusion silicon nitride is deposited over the entire assembly before the diffusion step by glow discharge sputtering, vacuum evaporation, or pyrolysis of a silaneammonia mixture. In this case a deposited molybdenum or pyrolytic silicon masking layer is used in the etching to expose the source and drain regions and subsequently removed if necessary. Silicon oxynitride is an alternative material for the doped insulation layer and the method is stated to be applicable to the manufacture of germanium and gallium arsenide devices. Linear and annular device configurations are suggested.
Patent GB-1338414-A (GB)
Title: High purity copper wire and the process of making it
IPC: C25D1/04
Filed: 1970-12-15
Abstract: 1338414 Electro-plating and production of copper wire KENNECOTT COPPER CORP 15 Dec 1970 [19 Dec 1969] 59565/70 Heading C7B High purity copper conductor wire for use at low temperatures is produced by electro-depositing copper on to a copper base wire, drawing the resultant wire to reduce it to its original diameter, repeating these steps till the electro-deposited copper forms at least 75% of the product wire, and thereafter annealing the wire. Electroplating may be carried out using as counterelectrode a copper tube, through which is passed the wire to be plated and a flow of electrolyte. A fluoborate or sulphate electrolyte may be used. The sulphate electrolyte may include glue, calcium lignosulphate, casein or thiourea.
Patent GB-1248005-A (GB)
Title: Curable amorphous olefinic terpolymers
IPC: C08F210/00
Filed: 1969-12-10
Abstract: 1,248,005. Olefinic terpolymers. SNAM PROGETTI SpA. 10 Dec., 1969 [18 Dec., 1968], No. 60399/69. Heading C3P. Curable, amorphous olefinic terpolymers of two different alpha-olefins having up to 10 carbon atoms, and an alkenyl-substituted polycyclic polyene hydrocarbon containing at least two rings, at least one of the rings having an endomethylene group, at least one other ring being cycloolefinic and the cycloolefinic ring being substituted by at least one alkenyl radical, claimed per se, can be prepared by polymerizing the monomers in the presence of a catalyst - comprising a compound of a Group IV to Group VIII transition metal and an aluminium compound of the formula AlRX 1 X 2 .mZ, wherein R is hydrogen or C 1-10  alkyl, each of X 1  and X 2  is hydrogen, C 1-10  alkyl, halogen or secondary amine, Z is a Lewis base and m is 0 or an integer, or a polyiminoalane. In the examples: (1) ethylene, propylene and a compound of the formula are polymerized in n-hexane using (C 2 H 5 ) 2 ClAl and vanadium triacetylacetonate; (2) ethylene, propylene and wherein R is hydrogen, or wherein R is hydrogen and n is one, or wherein R is hydrogen and n is one, are polymerized in n-heptane using (C 2 H 5 ) 2 AlCl and vanadium in acetylacetonate; (3) ethylene, propylene and wherein R is hydrogen are polymerized in toluene utilizing VCl 4  and (C 2 H 5 ) 2 ClAl; (4) ethylene, propylene and wherein R is hydrogen and n is one, are polymerized in toluene using (C 2 H 5 )AlCl and vanadium triacetyl acetonate in the presence of anisole.
Patent GB-1191760-A (GB)
Title: Shear Plates for Dry Shavers, and Process for Manufacturing the Shear Plates
IPC: B26B19/38
Filed: 1968-12-24
Abstract: 1,191,760. Making dry shaver shear plates. CARINTHIA ELEKTROGERATE G.m.b.H. 24 Dec., 1968 [25 March, 1968], No. 61425/68. Heading B3A. [Also in Divisions B4 and C7] A perforated shear-plate for dry shavers comprises a main body 1 made from steel foil and having a network forming bridges 2 between the holes 1 so as to provide rims 3 which are flanged and ground, the main body of the shear plate consisting substantially of a soft, hardenable steel, whereas in the region of the flanged and ground rims of the holes, the material has a sub-microscopic, over-quenched martensitic structure containing residual austenite. The shear-plate is produced by first stamping a strip of steel containing at least 5% carbon, the strip being stamped to produce several shearplates. The strip is then mounted on the periphery of a massive metal drum with the flanges facing outwardly, the drum then being rotated slowly and the strip thrust against the surface of a rapidly-rotating disc of high-speed steel which grinds the strip and also causes an abrupt development of heat in the region of the rims 3. As soon as the required temperature is reached, the strip is cooled by the mass of metal in the drum. The surfaces of the rims are simultaneously ground during the heating process. The strip of foil is finally separated into individual shear-plates.
Patent GB-672854-A (GB)
Abstract: 672,854. Centrifugal ovens. PROSILIS. July 24, .1950 [July 30, 1949], No. 18401/50. Class 39(iii) A fluid-tight rotary drum 1 includes non-rotary electrode holders 13, 14 supporting a resistance electrode 20, and end covers 24 rotating about the holders and capable of longitudinal movement relative thereto, the covers and drum having rings 10, e.g. of rubber, between them, serving as joint and coupling members. The drum rests on rollers 2 and is driven by a motor 4. Carriages 5, 6 carry bearings for the covers and guides 11, 12 for the electrode holders. Each holder has a seal formed by rubber rings 15, 15a and the spaces enclosed by the pairs of rings are filled with sealing liquid from pipes 17. Vacuum producing pipes 18, and cooling water pipes 19 are provided, and springs 23 reduce the electrode clamping pressure.
Patent GB-684003-A (GB)
Abstract: 684,003. Counting-apparatus. KONINKLIJKE NEDERLANDSCHE GISTEN SPIRITUSFABRIEK N.V. Jan. 22, 1951 [Jan. 21, 1950], No. 1637/51. Class 106 (i). Indicating apparatus for a steam-generating plant operated by combustion, having measuring devices for the quantity of fuel consumed and steam produced, indicating in comparable units is characterised by a differential system, two elements of which are respectively actuated by the two measuring devices in such a way that the position of the third element of the system as a whole relatively to those of the first two elements is unaffected during the maintenance of a predetermined proportion between the quantities of fuel consumed and steam produced per unit of time, the third element of the differential system driving a counting mechanism. One sun-wheel 17 of a differential gear mechanism is driven through chain and sprocket by a shaft 14 which is driven at a speed depending on the rate of consumption of fuel, while the other sun-wheel 12 is driven through chain and sprocket 11, 10, shaft 9, bevel gears 8 and friction discs 5, 4 by a shaft 2 which is driven at a speed depending on the rate of production of steam. The disc 5 is pressed by a spring 6 against the periphery of the disc 4, the transmission ratio between the discs being set manually by adjusting the position of the disc 4 so that the sun-wheels 17, 12 rotate at equal speeds in opposite senses while a desired proportion for normal efficiency between the rate of consumption of fuel and the rate of production of steam is maintained, this proportion being indicated by a pointer 52. While the speeds of the sun-wheels are unequal, the planetary system 21 progresses one way or the other, driving a shaft 25 whose revolutions are counted algebraically by a counter 26 which thus registers at the end of any period of time the difference between the quantity of fuel consumed, registered by a counter 3, and the predetermined proportion of the quantity of steam produced, registered by a counter 15, i.e. the nett saving or wasting of fuel.
Patent GB-2004306-A (GB)
Title: Textile winding apparatus
IPC: D01H1/34
Filed: 1978-08-25
Abstract: A textile winding head of the driven flyer type having a rotary bobbin carrier is provided with an adjustable regenerative brake 28 of the electromagnetic induction type, and a controller 35 for increasing the braking torque progressively as the diameter of the package increases during winding so as to maintain close control over the tension of the material being wound. A tachogenerator 40 may be connected to turn with the bobbin carrier to provide a signal varying with the angular velocity of a package being wound to provide an input signal to the controller for adjusting the braking torque. Additional tachogenerators may be connected to turn respectively with the delivery rollers and the flyer to provide correction signals, and the controller is preferably a computer for receiving the signals from the three tachogenerators and for providing an output signal for adjusting the braking torque. The brake is preferably an electric motor connected regeneratively and this may control more than one winding head, the torque being reduced automatically in the event of an end break. <IMAGE>
Patent GB-2009538-A (GB)
Title: Control system for a AC motor driving a pumpjack unit
IPC: H02P25/18
Filed: 1978-11-02
Abstract: A three phase high slip motor driving a pumpjack unit is controlled to automatically match the load by changing the stator windings between different connections in response to load increase or after a predetermined time in a higher load condition. In one embodiment relay contacts A1 A2 A3 connect stator windings 26, 28, 30 in a star low-torque mode, until disconnected by operation of a programmer (PT) Figure 2 (not shown) or until the stator current exceeds a first predetermined value, whereupon relay 40 operates to open and close contacts A1 A2 A3 and B1 B2 B3 to connect the windings in a star/delta medium-torque mode. A timer 50 operates to restore the star connection after a first predetermined time but if, before this occurs, the stator current exceeds a second predetermined value, relay 60 operates to open and close contacts B1 B2 B3 and C1 C2 C3 to connect the windings in a delta high-torque mode and also to reset timer 50. After a second predetermined time set by timer 68 the star/delta connection is restored, followed by repetition of the previous operations according to whether or not the predetermined currents are exceeded again. In a simpler embodiment the motor is switched only between star and delta. <IMAGE>
Patent GB-2027565-A (GB)
Title: Improvements in or relating to the switching of digital signals
IPC: H04Q11/04
Filed: 1978-11-07
Abstract: A digital switching device of the stored programme type has a first stage 11, an input time switching stage 15 arranged to receive signals from the first stage 11, an output time switching stage 16 and a central control unit 25. The first stage 11 multiplexes digital signals from a plurality of ports, separates data signals from signalling information, transmits the signalling information to circuit 12 and transmits the data signals to the input time switching stage 15. The time switch 15 operates under the central control unit 25 to transmit data signals from an input port in a particular time slot on a highway to the output switch 16. The first stage 11 then receives the data signals from the switch 16, combines this data with signalling information from circuit 14 and, after demultiplexing, transmits the signals to appropriate ports. <IMAGE>
Patent GB-2009822-A (GB)
Title: Cattle grids
IPC: A01K3/00
Filed: 1978-12-05
Abstract: A cattle grid is formed as a solid concrete structure having a plurality of side-by-side elongated curved or semi-spherical ribs (4). The cattle grid, may be installed by excavating a site for the grid, laying down a conventional concrete screed, and locating on the screed a plurality of precast concrete units which together define the requisite concrete structure. <IMAGE>
Patent GB-2013662-A (GB)
Title: Substituted heterocyclic benzamides methods of preparing them compositions containing them and their use es behaviour modifiers
IPC: C07D207/08
Filed: 1979-01-17
Abstract: There are provided new substituted heterocyclic benzamides and derivatives thereof which provide modifications on the central nervous system.
Patent GB-2041077-A (GB)
Title: Carburettor
IPC: F02M17/02
Filed: 1979-01-31
Abstract: The carburettor 10 has a fuel inlet 33 controlled by a needle valve 32. Air is drawn through bores 14, 15 into a space 50 around a piston-like valve member 44 which is controlled conjointly with the valve 32. The air flows between the block 12 and the valve member 44 towards opening 74 where fuel and air from the inlet 277 enter. Slots (77), Fig. 7 (not shown), in the member 44 provide air inlets between the member and the block 12 when they abut at idling. <IMAGE>
Patent GB-2021673-A (GB)
Title: Panel assembly
IPC: F16B12/02
Filed: 1979-04-25
Abstract: The invention relates to a panel assembly and to apparatus for constructing the panel assembly and a system comprising the combination of a panel assembly or assemblies and furniture units, and/or fixtures or fittings the panel assemblies providing a screen or screens defining a location or area for working or other purposes, a panel assembly comprising a panel 32 disposed between panel supports 30 at each lengthwise extending edge of the panel, means 31 at each lengthwise extending edge of the panel for engaging a panel support and retaining means 33 engageable with the panel support engaging means and the panel support for securing the panel to each support. <IMAGE>
Patent GB-2064062-A (GB)
Title: Hydraulic damping units with elongate by-pass slots
IPC: F16F9/346
Filed: 1979-06-12
Abstract: In a hydraulic piston-cylinder damper, to provide a by-pass passage from one side of the piston to the other, there is provided an insert 8 within which the piston 1 slides, the insert 8 having or defining an elongate aperture 11 which preferably has the variation in shape shown. The insert may be made of spring steel, or rigid or resilient plastics. <IMAGE>
Patent GB-2054136-A (GB)
Title: Apparatus for Measuring the Thickness of Thin Layers
IPC: G01B15/02
Filed: 1979-07-19
Abstract: Apparatus for measuring the thickness of thin layers 29 of strip- or wire-like material comprises a beta emitter (in tubes 17, 22) for directing radiation toward the layer, and a detector 11 for receiving radiation scattered back from the layer and operable to produce a count in response thereto. The arrangement is such that the curve showing the relationship between the counting rate and the distance of the emitter from the layer has a plateau region in which variation of the distance causes substantially no change in the counting rate, and the distance between the emitter and the layer is in this plateau region. The relationship is preferably obtained by arranging for the ratio of a characteristic cross- sectional dimension (D) of a window of the detector to the diameter of the intersection area between the layer and the radiation from the beta emitter to be from 15 to 2, and preferably from 10 to 4. <IMAGE>
Patent GB-2054555-A (GB)
Title: Pyrazolyl amino imidazolines
IPC: C07D231/38
Filed: 1979-07-27
Abstract: Pyrazine derivatives of the formula   <IMAGE> wherein R1 and R2 are hydrogen atoms or are selected from various defined organic groups,  R3 is hydrogen, halogen, loweralkyl or aryl, and R4 is hydrogen, acyl, amino or loweralkyl, and the pharmaceutically acceptable acid addition salts thereof, may be used as anti-inflammatory, antihypertensive or diuretic agents.
Patent GB-2032310-A (GB)
Title: Composite casting
IPC: B22C9/04
Filed: 1979-09-27
Abstract: A method of making a composite casting such as a gas turbine engine blade comprises providing a mould having at least part of an interior surface made of the ceramic material, casting metal into the mould and removing the mould from the casting so as to leave the ceramic material in situ on the casting. The mould can be made using a lost wax process, the ceramic material which becomes part of the casting being applied in the form of a slurry as the first layers of the investment.
Patent GB-2036295-A (GB)
Title: Gas burner
IPC: F23D14/64
Filed: 1979-10-02
Abstract: A gas burner comprises a body 1 formed by two sheet metal shells 2, 3, joined together by flanges along their margins and shaped to constitute a body of Venturi tube form with an expansion chamber 5 and a chimney tube 6. A bracket 8 is secured to the base 10 of a cooking apparatus and is provided with a flange 9 to locate the burner body. A burner head 7 extends through a central aperture 12 of the bracket 8, the latter being provided with resilient tongues to engage in oblique slots 18 of the head 7 so that the latter is releasably fastened by means of the bayonet joint type. Screws 15 engage in nuts 14 secured to the bracket 8 in order to hold a dished ring 16 which engages the upper wall 11 of the cooking apparatus housing. An igniter 13 is secured in a hole in the bracket 8. <IMAGE>